The answer is A
Electron micrograph pictures showing a blue center surrounded by 2 layers.
A because a controlled experiment only tests one variable.
For climate change, global warming can be a large factor
Hey there,
The answer is grief
Hope this helps :D
<em>~Top</em>
I did this one a while back.
I answered that precipitation has a high effect due to greatly effecting the fish and plants that lived there, and that the pollution would change the water quality and poison many things.
Hope this helps.
Good luck!
-RxL
